Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Control system for permanent magnet synchronous motor










Image Number 14 for United States Patent #5854547.

To provide a control system for a permanent magnet synchronous motor which can ensure stability of the current control system, even if the revolution frequency of the motor becomes higher and the terminal voltage of the motor exceeds the inverter maximum output voltage. In this method, when the revolution frequency of the motor exceeds a specified value, the size of the voltage vector is made a specified voltage vector, and a modulation factor based on its value is obtained. At the same time, a magnetic flux direction current correction value is found based on the size of a voltage vector from a polarity coordinates conversion unit and the above specified voltage vector size. Then, the magnetic flux direction current instruction is corrected by that value.








 
 
  Recently Added Patents
Molded surface of a concrete product
Method for generating codewords
Image forming apparatus
System and method for investing public deposits
Interaction analysis and prioritization of mobile content
Anti-slip strip for vehicle running boards
Method, apparatus and computer program product for providing metadata entry
  Randomly Featured Patents
Systems and methods for close queuing to support quality of service
Robot system
Method and apparatus for steering idle mobile stations
System and method for identifying bootable device by generating a signature for each bootable device where the signature is independent of a location of the bootable device
Sterilizable cable assemblies
Hand-held microwave intra-oral dental system
Fluid operated wrench
Movement monitor having an infrared detector
Covalent attachment of macromolecules to polysulfones or polyethersulfones modified to contain functionalizable chain ends
Omega conopeptide compositions